To enter your Norton product key and activate your Norton antivirus software, follow these steps:

1. Locate Your Product Key: Your Norton product key is a 25-character alphanumeric code that should be included with your purchase. It might be on a card, in an email, or on the packaging.

2. Install Norton Software: If you haven't already done so, you need to download and install the Norton antivirus software on your computer. You can do this by visiting the Norton website and signing in to your Norton account or creating one if you don't have an account yet.

3. Sign In to Your Norton Account: After installation, open the Norton software. You will be prompted to sign in to your Norton account. Use the email address and password associated with your Norton account. If you don't have an account, you can create one during this process.

4. Enter the Product Key:

   • If prompted, you may need to click on "Activate Now" or a similar option.
   • Enter the 25-character product key in the provided field. Be careful to enter it correctly, including any hyphens or spaces.
   • Click "Next" or a similar button to proceed.

5. Activation: Norton will validate your product key and activate your software. This process may take a few moments.

6. Complete Setup: Follow any on-screen instructions to complete the setup process, How do I Enter My Product Key Norton including configuring your antivirus settings and running a scan if desired.

7. Confirmation: Once the activation is successful, you should receive a confirmation message indicating that your Norton product is now active.

8. Updates: Ensure that your Norton software is set to receive automatic updates to keep your antivirus protection up to date.

Your Norton product should now be activated and ready to provide protection for your computer. Remember to keep your product key in a safe place for future reference, as you may need it for reinstallation or renewing your subscription.